CN113430881A - Regenerated roadbed laying method based on solid waste full utilization - Google Patents
Regenerated roadbed laying method based on solid waste full utilization Download PDFInfo
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- CN113430881A CN113430881A CN202110045682.8A CN202110045682A CN113430881A CN 113430881 A CN113430881 A CN 113430881A CN 202110045682 A CN202110045682 A CN 202110045682A CN 113430881 A CN113430881 A CN 113430881A
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- 239000002910 solid waste Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000010426 asphalt Substances 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000000203 mixture Substances 0.000 claims abstract description 29
- 239000004568 cement Substances 0.000 claims abstract description 24
- 239000004575 stone Substances 0.000 claims abstract description 24
- 230000008929 regeneration Effects 0.000 claims abstract description 23
- 238000011069 regeneration method Methods 0.000 claims abstract description 23
- 235000019738 Limestone Nutrition 0.000 claims abstract description 13
- 239000006028 limestone Substances 0.000 claims abstract description 13
- 239000004033 plastic Substances 0.000 claims abstract description 10
- 229920003023 plastic Polymers 0.000 claims abstract description 10
- 239000004677 Nylon Substances 0.000 claims abstract description 9
- 239000004571 lime Substances 0.000 claims abstract description 9
- 229920001778 nylon Polymers 0.000 claims abstract description 9
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 7
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims description 40
- 239000008188 pellet Substances 0.000 claims description 33
- 239000004566 building material Substances 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 5
- 239000004567 concrete Substances 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 239000004746 geotextile Substances 0.000 claims description 3
- 238000003801 milling Methods 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000009270 solid waste treatment Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000010813 municipal solid waste Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003349 gelling agent Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/003—Foundations for pavings characterised by material or composition used, e.g. waste or recycled material
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a regeneration roadbed laying method based on solid waste full utilization, which comprises the following steps: (a) prefabricating an asphalt layer solid waste reclaimed material and a macadam mixture; (b) mixing the asphalt layer solid waste regeneration material, the broken stone mixture and lime to build a regenerated roadbed lime stone layer; (c) paving an impermeable layer and a fixing frame, mixing the asphalt layer solid waste reclaimed materials, the broken stone mixture, the plastic strips and the nylon ropes, and then injecting the mixture into the fixing frame to build a regenerated roadbed graded drainage layer; (d) mixing the crushed stone mixture with natural crushed stone, cement and water to build a regenerated roadbed cement-stabilized crushed stone layer; (e) mixing the solid waste recycled materials of the asphalt layer with natural macadam to build the asphalt layer of the recycled roadbed. The regenerated roadbed paved by the method has the characteristics of high structural strength, high stability, good drainage effect and the like, and simultaneously solves the problems of low utilization rate of solid waste treatment, untimely drainage of the regenerated roadbed, damage to a base layer and the like.
Description
Technical Field
The invention relates to the technical field of roadbeds, in particular to a regeneration roadbed laying method based on solid waste full utilization.
Background
With the demand of social development, urban construction is continuously carried out, wherein a large amount of asphalt roads need to be rebuilt, expanded and rebuilt, which inevitably generates a large amount of urban solid wastes, and the stacking and treatment of the solid wastes become a huge problem. In order to respond to the national requirements on building a conservation-oriented society, developing circular economy and the like, the recycling of solid wastes is increasingly emphasized. For recycling of solid wastes, related researchers have proposed methods, such as "method of applying construction waste recycled material to semi-rigid base inorganic recycled material (CN 201910654238.9)", in which construction waste is crushed into recycled material particles, soil solidifying agent and water are added to perform material sealing, and gelling agent is added to adjust to an optimal water content during use, so as to obtain semi-rigid base inorganic recycled material; "slope protection structure and river course bank protection (CN201720825703.7) that have building rubbish reclaimed materials", the bed course, basic unit, the bank protection brick of this bank protection are made by building rubbish reclaimed materials. Although the method recycles the solid waste, the method has the disadvantages of complex components of the construction waste, incomplete utilization and low utilization rate, and cannot fundamentally solve the problem of solid waste accumulation pollution. In addition, the roadbed paved by the reclaimed materials has the phenomenon that the base layer is damaged due to untimely water drainage because the roadbed is broken stone.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for paving a regenerated roadbed based on full utilization of solid wastes.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for paving a regenerative roadbed based on solid waste full utilization comprises the following steps:
(a) separating an asphalt layer of old asphalt road solid waste through milling and crushing, and recycling to prepare an asphalt layer solid waste reclaimed material; preparing an old road foundation concrete block layer, a water-stable gravel layer and a slag road foundation layer of the solid waste of the old asphalt road into a gravel mixture;
(b) mixing 20% of the solid waste regeneration material of the asphalt layer, 10% of the gravel mixture and lime, and filling into a regenerated roadbed lime stone layer;
(c) paving impermeable geotextile on the upper surface of the mud lime stone layer of the regeneration roadbed to form an impermeable layer, then arranging a fixing frame on the impermeable layer, preparing 50% of the solid waste reclaimed material of the asphalt layer and 20% of the crushed stone mixture into a graded ingredient, mixing the graded ingredient with plastic strips and nylon ropes to form a mixed building material, and injecting the mixed building material into the fixing frame to build the graded drainage layer of the regeneration roadbed;
(d) drainage ditches are dug at the edges of two sides of the bottom of the graded drainage layer of the regenerated roadbed in the width direction;
(e) grading 70% of the crushed stone mixture, mixing with natural crushed stone, cement and water, and paving above the regenerated roadbed graded drainage layer to build a regenerated roadbed cement stabilized crushed stone layer;
(f) mixing 30% of the solid waste reclaimed materials of the asphalt layer with new asphalt, and paving the mixture above the cement stabilized gravel layer of the regenerated roadbed to build the asphalt layer of the regenerated roadbed.
In the step (a), the lime mixing amount is 2% of the total mass of the regenerated roadbed mud-lime bonded layer.
The regenerated roadbed mud lime stone layer comprises a trapezoidal main body part and a trapezoidal convex block part positioned on the upper surface of the main body part, and the laying shape of the fixing frame is consistent with the surface structure shape formed by the upper surface and the inclined plane of the main body part and the upper surface of the convex block part (52)
In the step (c), the thickness of the impermeable layer is 10-12mm, and the total mixing amount of the plastic strips and the nylon ropes is 2% of the total mass of the regenerated roadbed graded drainage layer.
In the step (c), the fixing frame comprises material placing grooves which are arranged in a grid shape, and water leakage holes for draining water are arranged on the material placing grooves.
In the step (c), the grading materials are prepared according to the following particle grading and mass fraction: 35% of pellets having a particle size of 4.75mm or less, 20% of pellets having a particle size of 4.75mm or more and 9.5mm or less, 10% of pellets having a particle size of 9.5mm or more and 13.2mm or less, 10% of pellets having a particle size of 13.2mm or more and 16mm or less, 5% of pellets having a particle size of 16mm or more and 19mm or less, 10% of pellets having a particle size of 19mm or more and 26.5mm or less, and 8% of pellets having a particle size of 26.5mm or more and 31.5mm or less.
In the step (e), the mixing amount of the natural macadam is 20 percent of the total mass of the regenerated roadbed cement stable macadam layer, the mixing amount of the cement is 4.5 percent of the total mass of the regenerated roadbed cement stable macadam layer, and the mixing amount of the water is 4.8 percent of the total mass of the regenerated roadbed cement stable macadam layer.
In the step (e), the crushed stone mixture is prepared according to the following particle composition and mass ratio: 29% of pellets having a particle size of 4.75mm or less, 25% of pellets having a particle size of 4.75mm or more and 9.5mm or less, 26% of pellets having a particle size of 9.5mm or more and 19mm or less, and 20% of pellets having a particle size of 19mm or more and 31.5mm or less.
In the step (f), the mixing amount of the new asphalt is 70 percent of the total mass of the asphalt layer of the regeneration roadbed; the thickness of the regenerated roadbed asphalt layer is 17-20 cm.
The invention has the beneficial effects that:
(1) the method recycles and remakes all solid wastes of old asphalt roads (the old asphalt roads are composed of asphalt layers, concrete block layers of old road bases, water stabilizing gravel layers and slag road base layers of the old asphalt roads), and then utilizes the solid wastes in proportion to newly build the asphalt roadbed, the laying method is simple and easy to implement, the utilization rate of the solid wastes of the old asphalt roads reaches 100%, the problem of solid waste stacking is solved, the environmental protection is facilitated, and the laying cost of the asphalt roadbed is greatly reduced.
(2) The regenerated roadbed paved by the method comprises the regenerated roadbed graded drainage layer with the impermeable layer, which is beneficial to timely drainage of the asphalt road and ensures that the filling soil below the roadbed is not damaged.
(3) The regenerated roadbed paved by the method comprises the regenerated roadbed graded drainage layer with the trapezoidal convex block part and the fixing frame capable of draining water, is favorable for fixing mixed building materials, particularly for paving the mixed building materials on the slope of the convex block part, can ensure that seepage water quickly flows out, and can reinforce the roadbed.
Drawings
FIG. 1 is a schematic cross-sectional structure of a regenerated roadbed paved by the method of the invention;
fig. 2 is a perspective view of a fixed frame of a roadbed to be regenerated, which is laid by the method of the invention.
In the figure: the recycled roadbed asphalt layer 1, the recycled roadbed cement stabilized gravel layer 2, the recycled roadbed graded drainage layer 3, the fixing frame 31, the material placing groove 311, the water leakage holes 312, the impermeable layer 4, the recycled roadbed lime stone layer 5, the main body part 51, the bump part 52 and the drainage ditch 6.
Detailed Description
The invention is further described with reference to the accompanying drawings and the detailed description below:
a method for paving a regenerative roadbed based on solid waste full utilization comprises the following steps:
(a) separating an asphalt layer of old asphalt road solid waste through milling and crushing, and recycling to prepare an asphalt layer solid waste reclaimed material; preparing an old road foundation concrete block layer, a water-stable gravel layer and a slag road foundation layer of the solid waste of the old asphalt road into a gravel mixture;
(b) mixing 20% of the solid waste regeneration material of the asphalt layer, 10% of the gravel mixture and lime, and filling into a regenerated roadbed lime stone layer 5; the lime mixing amount is 2 percent of the total mass of the regenerated roadbed mud lime stone layer 5; before construction, the water content of the asphalt layer solid waste reclaimed material and the crushed stone mixture needs to be measured, and if the water content does not reach the construction standard, a proper amount of water can be added to ensure the bonding strength of the regenerated roadbed lime stone layer 5;
(c) paving impermeable geotextile on the upper surface of a regenerated roadbed lime stone layer 5 to form an impermeable layer 4, then arranging a fixing frame 31 on the impermeable layer 4, preparing 50% of the asphalt layer solid waste reclaimed material and 20% of the gravel mixture into a graded material, mixing the graded material with a plastic strip and a nylon rope to form a mixed material, and injecting the mixed material into the fixing frame 31 to form a regenerated roadbed graded drainage layer 3; the total mixing amount of plastic strip, nylon rope is 2% of 3 total mass of regeneration road bed gradation drainage blanket, and the length of plastic strip, nylon rope is 20mm, adds the plastic strip and plays to add the muscle winding effect with the nylon rope, not only can improve the intensity of regeneration road bed gradation drainage blanket 3, can also prevent the scattering of gradation rubble.
The grading materials are prepared according to the following particle grading and mass fractions: 35% of pellets having a particle size of 4.75mm or less, 20% of pellets having a particle size of 4.75mm or more and 9.5mm or less, 10% of pellets having a particle size of 9.5mm or more and 13.2mm or less, 10% of pellets having a particle size of 13.2mm or more and 16mm or less, 5% of pellets having a particle size of 16mm or more and 19mm or less, 10% of pellets having a particle size of 19mm or more and 26.5mm or less, and 8% of pellets having a particle size of 26.5mm or more and 31.5mm or less.
The regenerated roadbed mud-ash stone layer 5 comprises a trapezoidal main body part 51 and a trapezoidal convex block part 52 positioned on the upper surface of the main body part 51, the laying shape of the fixing frame 31 is consistent with the surface structure shape formed by the upper surface and the inclined plane of the main body part 51 and the upper surface of the convex block part 52, and the regenerated roadbed graded drainage layer 3 is made into a structure with a trapezoidal convex shape through the arrangement, so that the drainage ditch 6 is favorably drained of seepage water.
The fixed frame 31 comprises material placing grooves 311 which are arranged in a grid shape, and water leakage holes 312 for water drainage are arranged on the material placing grooves 311. The fixed frame 31 is made of high polymer plastics such as PVC, ABS and the like, the height of the fixed frame is 15-20cm, each material placing groove 311 is of an upper end and lower end opening structure, or of a structure with an opening at the upper end and a water leakage hole 312 at the bottom, and the wall thickness of the material placing groove 311 is 30 mm; the water leakage holes 312 are arranged on two side surfaces of the material placing groove 311 along the width direction of the regeneration roadbed graded drainage layer 3, and the diameter of the water leakage holes 312 is 1 cm. The fixing frame 31 is used for fixing the crushed stone mixture, is beneficial to paving materials on the slope of the bump part 52, and can ensure the smooth drainage of the seepage water. The water leakage holes 312 at the joint of the edges of two adjacent fixing frames 31 are aligned and communicated one by one, which is more beneficial to timely discharge of water seepage.
The impermeable layer 4 is paved by adopting geotechnical impermeable cloth with the thickness of 1mm, the thickness of the impermeable layer 4 is 10-12mm, and the impermeable layer 4 plays a role in water resistance and can prevent water from continuously seeping to damage filled soil below the roadbed.
(d) Drainage ditches 6 are dug at the edges of two sides of the bottom of the regenerated roadbed graded drainage layer 3 in the width direction; the depth of the drainage ditch 6 is 30-35cm, and the height of the upper end of the drainage ditch 6 is arranged between the upper surface and the lower surface of the impermeable layer 4, so that the seepage water is ensured to flow into the drainage ditch 6.
(e) Grading 70% of the crushed stone mixture, mixing with natural crushed stone, cement and water, and paving the mixture above a regenerated roadbed graded drainage layer 3 to build a regenerated roadbed cement stabilized crushed stone layer 2; the mixing amount of the natural macadam is 20 percent of the total mass of the regenerated roadbed cement stable macadam layer 2, the mixing amount of the cement is 4.5 percent of the total mass of the regenerated roadbed cement stable macadam layer 2, and the mixing amount of the water is 4.8 percent of the total mass of the regenerated roadbed cement stable macadam layer 2.
The crushed stone mixture is prepared according to the following particle composition and mass ratio: 29% of pellets having a particle size of 4.75mm or less, 25% of pellets having a particle size of 4.75mm or more and 9.5mm or less, 26% of pellets having a particle size of 9.5mm or more and 19mm or less, and 20% of pellets having a particle size of 19mm or more and 31.5mm or less.
(f) Mixing 30% of the solid waste reclaimed materials of the asphalt layer with new asphalt, and paving the mixture above the regenerated roadbed cement stable crushed stone layer 2 to build a regenerated roadbed asphalt layer 1. The new asphalt mixing amount is 70 percent of the total mass of the regenerated roadbed asphalt layer 1; the thickness of the regenerated roadbed asphalt layer 1 is 17-20 cm.
The regenerated roadbed structure paved by the method is shown in figures 1-2, and the regenerated roadbed lime stone layer 5, the regenerated roadbed graded drainage layer 3, the regenerated roadbed cement stabilized gravel layer 2 and the regenerated roadbed asphalt layer 1 are paved from bottom to top in sequence, so that the problems that the existing solid waste treatment utilization rate is low, the regenerated roadbed drainage does not damage a base layer in time and the like are solved, and the use requirements of the roadbed structure such as high strength, high stability and the like are met.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A method for paving a regenerative roadbed based on full utilization of solid wastes is characterized by comprising the following steps: the method comprises the following steps:
(a) separating an asphalt layer of old asphalt road solid waste through milling and crushing, and recycling to prepare an asphalt layer solid waste reclaimed material; preparing an old road foundation concrete block layer, a water-stable gravel layer and a slag road foundation layer of the solid waste of the old asphalt road into a gravel mixture;
(b) mixing 20% of the solid waste regeneration material of the asphalt layer, 10% of the gravel mixture and lime, and filling into a regenerated roadbed lime stone layer;
(c) paving impermeable geotextile on the upper surface of the mud lime stone layer of the regeneration roadbed to form an impermeable layer, then arranging a fixing frame on the impermeable layer, preparing 50% of the solid waste reclaimed material of the asphalt layer and 20% of the crushed stone mixture into a graded ingredient, mixing the graded ingredient with plastic strips and nylon ropes to form a mixed building material, and injecting the mixed building material into the fixing frame to build the graded drainage layer of the regeneration roadbed;
(d) drainage ditches are dug at the edges of two sides of the bottom of the graded drainage layer of the regenerated roadbed in the width direction;
(e) grading 70% of the crushed stone mixture, mixing with natural crushed stone, cement and water, and paving above the regenerated roadbed graded drainage layer to build a regenerated roadbed cement stabilized crushed stone layer;
(f) mixing 30% of the solid waste reclaimed materials of the asphalt layer with new asphalt, and paving the mixture above the cement stabilized gravel layer of the regenerated roadbed to build the asphalt layer of the regenerated roadbed.
2. The method for laying the regeneration roadbed based on the full utilization of the solid wastes as claimed in claim 1, wherein the method comprises the following steps: in the step (a), the lime mixing amount is 2% of the total mass of the regenerated roadbed mud-lime bonded layer.
3. The method for laying the regeneration roadbed based on the full utilization of the solid wastes as claimed in claim 1, wherein the method comprises the following steps: the regenerated roadbed mud lime stone layer comprises a trapezoidal main body part and a trapezoidal convex block part positioned on the upper surface of the main body part, and the laying shape of the fixing frame is consistent with the surface structure shape formed by the upper surface and the inclined plane of the main body part and the upper surface of the convex block part (52).
4. The method for laying the regeneration roadbed based on the full utilization of the solid wastes as claimed in claim 1, wherein the method comprises the following steps: in the step (c), the thickness of the impermeable layer is 10-12mm, and the total mixing amount of the plastic strips and the nylon ropes is 2% of the total mass of the regenerated roadbed graded drainage layer.
5. The method for laying the regeneration roadbed based on the full utilization of the solid wastes as claimed in claim 1, wherein the method comprises the following steps: in the step (c), the fixing frame comprises material placing grooves which are arranged in a grid shape, and water leakage holes for draining water are arranged on the material placing grooves.
6. The method for laying the regeneration roadbed based on the full utilization of the solid wastes as claimed in claim 1, wherein the method comprises the following steps: in the step (c), the grading materials are prepared according to the following particle grading and mass fraction: 35% of pellets having a particle size of 4.75mm or less, 20% of pellets having a particle size of 4.75mm or more and 9.5mm or less, 10% of pellets having a particle size of 9.5mm or more and 13.2mm or less, 10% of pellets having a particle size of 13.2mm or more and 16mm or less, 5% of pellets having a particle size of 16mm or more and 19mm or less, 10% of pellets having a particle size of 19mm or more and 26.5mm or less, and 8% of pellets having a particle size of 26.5mm or more and 31.5mm or less.
7. The method for laying the regeneration roadbed based on the full utilization of the solid wastes as claimed in claim 1, wherein the method comprises the following steps: in the step (e), the mixing amount of the natural macadam is 20 percent of the total mass of the regenerated roadbed cement stable macadam layer, the mixing amount of the cement is 4.5 percent of the total mass of the regenerated roadbed cement stable macadam layer, and the mixing amount of the water is 4.8 percent of the total mass of the regenerated roadbed cement stable macadam layer.
8. The method for laying the regeneration roadbed based on the full utilization of the solid wastes as claimed in claim 1, wherein the method comprises the following steps: in the step (e), the crushed stone mixture is prepared according to the following particle composition and mass ratio: 29% of pellets having a particle size of 4.75mm or less, 25% of pellets having a particle size of 4.75mm or more and 9.5mm or less, 26% of pellets having a particle size of 9.5mm or more and 19mm or less, and 20% of pellets having a particle size of 19mm or more and 31.5mm or less.
9. The method for laying the regeneration roadbed based on the full utilization of the solid wastes as claimed in claim 1, wherein the method comprises the following steps: in the step (f), the mixing amount of the new asphalt is 70 percent of the total mass of the asphalt layer of the regeneration roadbed; the thickness of the regenerated roadbed asphalt layer is 17-20 cm.
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Application publication date: 20210924 |